Usagi Tsukino is a 14-year-old schoolgirl who is very cheerful, but clumsy, and is always finding herself in unwanted trouble. One day Usagi meets a talking black cat named Luna, who reveals that dark forces are threatening the lives of the innocent and that Usagi has the power to stop them. Using a magic brooch, Usagi is transformed into Sailor Moon, the chosen guardian who fights for love and justice.

A new house of fortune opens up in the Juban District and quickly gains popularity for its accurate predictions. But soon, the customers who had their fortunes read begin to act violent, including Gurio Umino, a boy who has a crush on Usagi. Suspecting that this is the work of a monster, Usagi and Luna decide to investigate the situation.

All the girls in town are tuning in to a late-night radio program called "Midnight Zero" that reads out love letters sent in by the listeners. Meanwhile, a strange sleeping sickness is plaguing the town that puts many people to sleep, including Ms. Haruda and Naru.

Usagi is shocked to find out that she's gained weight from too much eating. Determined to get back into shape and fast, Usagi and her friends join a gym that advertises instant results for its members.

Usagi asks her family if they can officially keep Luna as a pet, but her little brother Shingo strongly objects due to his fear of cats. Instead, Shingo brings home a pet Chanela, a creature that smells like perfume. Shingo becomes so absorbed in the Chanela that he stops going to school, which worries Usagi.

One rainy day, Usagi bumps into Yusuke Amade, a famous musician who claims he is being chased by a monster. Realizing the man is telling the truth, Usagi and Luna decide to keep an eye on Yusuke by staking out the venue where he performs.